CHACO CANYON NATL MON, NEW MEXICO

Period of Record General Climate Summary - Growing Degree Days

Station:(291647) CHACO CANYON NATL MON
From Year=1922 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	18	84	258	520	799	1011	938	676	333	57	5	4705
40 S	5	23	107	365	885	1684	2695	3633	4310	4643	4700	4705	4705
45 M	0	3	27	141	369	649	856	783	527	198	15	0	3568
45 S	0	3	30	171	540	1189	2045	2828	3355	3552	3568	3568	3568
50 M	0	0	6	59	229	500	701	628	378	91	2	0	2594
50 S	0	0	6	65	294	793	1494	2123	2501	2592	2594	2594	2594
55 M	0	0	1	15	113	351	546	473	236	27	0	0	1762
55 S	0	0	1	15	129	480	1025	1499	1735	1762	1762	1762	1762
60 M	0	0	0	2	39	211	391	319	113	4	0	0	1079
60 S	0	0	0	2	41	252	643	961	1074	1079	1079	1079	1079

Corn Growing Degree Days
50 M	17	44	128	255	404	531	634	603	467	299	99	21	3501
50 S	17	61	190	444	848	1379	2014	2616	3083	3382	3481	3501	3501

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Jul 28, 2006
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu